Silencing attachment for typewriters



Jano 3, K R. G. DANL SILENCING ATTACHMENT FOR TYPEWRITERS Fil if. 7, 1924 4 Sheets-Sheet l Jan. 3, 192s;

R. G. DANIEL SILENCING ATTACHMENT FOR TYPEWRITERS 4 Sheets-Sheet .2

Filed (3G13.

INVENTOR .6, Dcrn/'e/ ATTORNEY..

2 3 t nm- 4 .m 5 A. 6, s l .M e h s 4 4 LTMM E m l MFV..

T AvN. DELL. me G c o .mm

T RAM G Nj H14,

Jan. 3, 1928.

VEN TOR. i I H A G lgin// ma `7ITTORNEY.

Jan. 3, 1928.

.R. G. DANIEL SILENCING ATTACHMENT FOR TYPEwRI'TERs Filed Oct. r7, 1924 4 Sheets-Sheet-4 INVENToR ?A 6;. 0eme/ Patented Jan. 3,71928.

TAT 1:57

`Wnrrnrt COMPANY, 'onivnw Yon'x; N. v ;-A-conronn'r'ron or' DELAWARE'.

a kl- 2f 'SILnNorNGATTACHMENTgFoR rvrnwni'rnns.-

application niea october?, 1924. s eriaiivo'.v 742,186. 4r

rllhis invention relatesto4 silencinfgwattachf ments fortypewriters and it is an object fof t-hefinvention to provide adeviceuofsimple,

construction comprising elements Y whichi-n connection with the framefand'the carriage v of a typewritingmachine of .the conventional form,cooperate to insulaterthe noise producing parts of theiinachiney by enclosure;

lwithout interfering with the operation of the machine.

,Other objects .of more vspecifically tothe .construction and ar'- 4rangement-of the parts included in the elej yembodiment 'of the invention has been shown .in yconnection with a typewriting machina ments above referred to; will be pointed out Vin detail `in the course ofthe following. de-

scription withreference to the accompanying kdrawings in which a.; simple f and `practical The machine illustrated kin .the Vdrawings does not represent any particular make but is more or less arbitrarily drawnto. aid yin it'is an `alim of the invention to provide. 'as

explaining the position of the elements comprised in the invention relative to Vthe ffixedv and-movable parts thereof and inasmuch as silencer .which `is applicable to different inproportion's and details of construction, it

will be'understo'od that changes inthe form, proportions and relative arrangement of the f ,elements and constituent partsof the sileiicfV Y ling-device may be availedofiwithout de -yA parting from the'spirit andrscopeof the in' vention as hereinafter .described t and indi-f cated-in the; hereuntoappended claims.

In the drawingsin the several-"views of, -Which' like parts arel similarly 'designated' throughout the several views,-

4Figure l represents a front typew'iiting machine with my silencer lin operative relation thereto; Y .L l

'Figure 2; a partially broken top view of the machineshown in Figure 1.7; i.

vl `igure 3.a siderelevation of'theinachinc looking` in the direction of thearrow V3 inA Figure ll;

Figure 4 ,A'a fragmentaryvertical section on the line Figure 1v, drawn toan en;-

lai-ged scale;

Figure o, va further enlarged fragnientary V Figure 2;

the invention relating the line 8&8, Figure 7 e elevation of a i? A TENT .i oi-ricag 4 ROYAL'G, lnnivinnforfnnnvnn," cononano, AssIGNon fro THE UNnEnWoon 'rifra-V vertical section takenV on y`the line ,5-5,--

Figure a` horizontal vsection along-the linen-f6, Figure 5;

F gure 7, anvenlarged-I ing the position ofthe bottom parts ofV the the direction of the arrow Soin Figurel artially sectionalA f side elevation of the .mechanism for adjust, i

Figure 8; a' fragmentary section taken on Figure 9, a partially'broken,sectionialongv the line 9.-?9, Figure 7;

Y Figure l0; a front view'of the element ofv the invention fastened tothe frameof the typewritingmachine in frontof the carriage thereof; Y Y

Figure-11,5 an enlarged sectionalonglthe plan view of the elementof the invention fixed rearwardly of line ll--l1, Figure 3; C

Figure-12, a fragmentary the carriage of the machine; i

-FigureY 13, a section taken 13f13, Figure 6; and Y. Figure 14; 'a fragmentary side=view ofthe casing element included in the attachment, Vshowing ai modification inthe construction: standard types of writing machines varying of the element.. f

the drawings, comprises three co-operating elements A; B and C, two of which are in` Von -theline practice'fixed to the frame of the typewrit-Q ing machine while the other is mounted upon.

the sliding carriage ofthe same.

ure l0, has a central opening 8 to admitof' the keys of the machine moving to and from the platen 9 onthecarriageandar'ound this f opening is attached a forwardly projecting cover l0 which by contactwith the outer surface of thevframe 7 completely encloses dowel pi'nsl'l insertedin sockets l2 oft-he'- 'l Ythe openings in thetopj and frontthereof Yf l' pivotedkeys are v100 .i The element Aconsists ofa plate wvhich v by means ofclamps 6 of suitablev construc-V tion, vis, hired in anupright :position tothe v frame '7 of` the ,typewriting machine imme- 1 diatelyfforward of thecar'riage of :the saine.

The plate 5 which is shown in detail in `Figplate as in the construction shown in the drawings, or it may be formed as in integral part of the plate if so desired.

The plate and the cover of the element A,

are preferably made partially or entirely of glassor if made of other material, the parts of this element as well as those of the other elements vhereinafter to be described, must be made of sound-proof material. such as heavy rubber, papier mch, or other composition, or of a composite construction of 4side plates and an interposed substance, or of metal or wood lined with sound-proof material.

Inasmuch as this feature of the invention is not new per se, having been employed inV other devices ofsimilar character, the parte` of the device have been shown in the Vdraw- -ln order to prevent of the projecting ends of Vthe plate interfering with the storage of ings in their simplest form as constructed of a solidniaterial. .Y f

Thev plate 5 providesa slide-surface for the element B which as stated before, is mount* ed on the carriage of the writing machine, and inorder to engage said element during the entire movement of the carriage and vin the eXtreme positions of the'same, it is essential that the ends of the plate project laterally beyond the sides of the frame of themachine to vwhich it is attached.

the machine in the well of'a typewriter desk or under a cover when not inijuse, the plate maybe removed by loosening thel clamps Vfrom the' frame, but in Aorder to avoid the the attachment is designed for use on a writing machinehaving ribbon-spools at the top of its frame and forward of the carriage asV shown at 7a in the drawings, the plate 5 isv provided with slots 5*1 for theV passage of the ribbon to the guides infront of the platen. of

the carriage, as best shown in VFigure 10.

The cover 10 is bound at its edges with a strip 1()LL of felt or other soft material to effcc-t a soundproof contact with thev surface of the frame, anda catch 10C is provided immediately beneath the opening at the front of the frame to lock the cover in place.

The element B of the invention comprises a casing which encloses the platen ofthe car riage, and the element C consists ofan applianee which is fastened on the frame Vof the machine rearward of the carriage and which provides a slide surface for the casing and co-operates therewithto continually close the opening in the top of the frame through which the carriage slides in the operation*V of t-he machine. The casing is composed of side plates 16, a back plate 17 and a cover plate'18 which is supported upon the side'plates and hinged to the back plate as at. 19. i* f' The' cover and the sideplates'of the casing are at their forward edges,iny slidingcontact with the upright parte 5 and in Order t@ render said Contact Sundftigh, the "partsv 16 andf`18 areprovidedwith edge strips of felt or other suitable material as shown at20v in the drawings. i- .LA pair of soft-rubber stops 21 at the back of the casing provide a rest for the coverin the open position and it' willfbe understoodwithout further illustration that spring, means may beused to facilitate the opening movement of the coverif so desired.,

vvrllhe cover has in its slanting front a windowf22 through which the operator observes the action of the type keys and the typed portion of vthe work sheet. upon the platen* and itV will be apparent without furtherfillustration that this window may be of any desired size and fbe extended if necessary. to^in clude the top better admission of light tothe work.v

The YAcasing is provided `with slotsy 23 through 'which may protrude the feed-roll releaselever and thfevarious-lieveis which 1 control the movementsv of the carriage and the platen, ,or extensions of said levers as shown at '24 and '25 in Figure 5, so that they can be. manipulated by the operator atV theY outside of the casi-ng.

AThe slots which 1n shape and position,

portion of the cover for the must necessarily be varied to correspond with i the location of theV levers on different makes resilientrstrips of felt, rubber orv othersoft Vof-typewriting machines, may bel closed by Y material as shown'at 26 in Figure 11, to pre-Y.r

ventwof the escape of the noise.y of the keysY platen, through the openings, in

striking the the operation of t-hefmaehine, Y

rlhe cover-of the casing has a longitudinal slot 27 slightlyl forward of'the guide Q8 which in V most typewriting machines prov vides a support'for they work sheet above the.

platen. Throughthis slot the papermay be fed to theplaten without opening the cover,

and the typed end portionk of the paper niov-` ing upwardly between the platen andv the* guide roller 29 will nd its way to and through the slot for itsl removaly by the operato-rafterrthe work is finished.

A yielding lid 30 hinged or otherwise sup-V ported on the-casing, .closes theslot against the escape of noise-by engagement with the paper extending through the slot in thek operation yof the machine.` The casing is mounted on the carriage by the support of I its side-walls upon the trunnions'l of the platen at oppositelendsthereof. The side plates are to this end provided wit-h vertical slots 32 which areopen at'their lower edges Said extension plates are held normally in a] thesame by means of clamps 34. 5 f *e to straddle .the -trunnions and when the casing is .in place, theseslots are' partially cov-A eredby parts ofthe element() .of the attachmenthereinaftertobe described.

Thethird elementC of the-invention comprises a plate33 which is supported on the frame lof the writing .,machine rearward of.

the; platen :and which is ,rrigidly fastened to :Theffplate shown in :detail injFigure v12, has two forwardly project-ingmembers 35 eX- 'tending at opposite Ysides ofv thev carriage. VExtension plates36 are' hinged at the edgesV of the plate members 35 to close the casing at kits underside during movement of the carriagein the. operation of the machine, and

horizontalposition by means of lever mechanism adapted tomove the plates about their hingesjto a substantially vertical position for the purpose of storing the machine to which the silencer'is applied, in a desk-*well or beneath a cover, when not in use. f 1

The lever mechanisms hereinabove referred to are appliedat opposite sides of the frame of the machine andas best shown in Figures 7, 8y and 9, each consistof a handlever 37 pivoted as at 38 Vupon a flanged bearing 39 which is fastened to the'frame ofthe machine. l

` l A rod.A 40 fulcrumed at one 'end upon a stud41 on' vthe bearing pivotally connected with thelever as at 42rfor the operation of the ymember which'` controls theposition of the extension plates of the `element B. i.

Themember consists ofa crank arm 43- fastened at an end of the pintle 44 ofthe hinge fby which the respective extension platef36 is connected at the'edge of the re spective member 35 of the element B, the

knuckle being Xed on the extension plate hy means of a knuckle plate 45. c

A link 46 connects the crank arm with the end ;of theY rod` 40 and when said rod ris lmoved tothe position shown in broken lines in Figure 7, the crank armais adjustedv to the broken line position of Figure randcausesv 'the extension plateto move about itspivotal aXis to asubstantially verticalfpositionfas Yindicated in the same view.

"Afspring 47y holds the lever. in its normal position and a spring-catch 43`pi'voted onthe bearing 39 automaticallylocks they lever in Vits adjusted position. .t

vkThe.construction of the typewritingma# lchine illustrated in the 'draivingsrequires the .provision of auxiliary extension plates 49 to accommodate certainpartsof the mechanisin of the machine whichfproject above the top of the frame.,` 1 4 'The plates'49 are likewise hinged to the side members 35 of the elementiC, vin alinementwith the primaryjextension plates 36.r

Theplates 49 are angular in sectioirand they are g supported upon friction. rollers 50 at y adjusting mechanisms by links 52.

'lt will) bey apparent'that when the rods" aremoved to the broken 'line position in Fig-.a

`vicinityof the machine.l y u l.

When the machine is notan use, it may the ends of short` ,levers lwhich -are full l crumedl to themembers 35 and which are;

connectedfwith the rods 40 of the respective` ure 7 hy adjustment of thehand levers `37 the l consequent .pivotal movement f of, the

levers 51 to the position shown j in broken lines inFigure 8, will cau'sethe plates to` l move-tothe upright lposition simultaneously withjthe plates 36.5 i ln order to close the Y openingof the frame ofthe ivritinginachine beneath the carriage, Y

`dling kthetrunnionsof the platen, ,the elements Afand G are fixed to the frame ofthe machine by the clamps 6 and 34,'.the cover member l0 of the element .A is fastened to.v the plate 5 by inserting thedowel pins 1l -in the socketsl', and `theslide plates 53of the casingrare fastened at'the sides thereof by insertingy the dove-tailed tenons of the heads '54 of the plates into correspondingly'-formed grooves of the side plates of the` casing. s v f The noise producing parts of the writing lili,"

machine are now kcompletely enclosedV and y y owing tothe sound-proof contact of the element irrvvith-V the relatively hired elements v B and C, and the presence of the'several plates 36 49 and 53 Ywhich `co-operatively close the underside Vof the casing and the i opening ofthe frame of the machine below the carriage, the soundspr'oduced in the op` eration ofthe machine are vdeadened so as to be` barely' vperceptible :to persons in `the,

he stored in the wellof aity-pewriter desk,

l under a cover,cor in otlierfspaces of limitedll,

proportions byjfolding the` extensions 13 of the plate 5V upon the relatively fixed bodyl portion of the saine after the bolts .'15 have been withdrawn from their sockets,V andby` l adjusting the plates; which close ,the under-- sideof the 'casingand thetop of the framel underneath. the carriage, to ,an uprightposiwriting machines without.' material changes in the. construction thereof and without any vdetrimental',effect upon the. operation or upon the 'etliciencyof the operator.

The levers controlling thefmovements of.

-tionfby.manipulation ofithe `hand `levers `37 y. it is a distinctive featureof the invention .that .itis applicable to dierent. types the carriage andthe platen areas accessible to the operator as beto-re theattachment was applied, the work-sheets are inserted and removed through the lid covered slot in the top of the casing, thefwriting on tlieworli -slieet is vconstantly visi-ble to the operatori through the window in the casing, and it is readily A by lifting the cover of the same. Y

llily invention thu-s provides a simple and inexpensive means -for converting a standard writing machine ot' ordinary construction to one lhaving all the advantages and none ot' the disadvantages ci' other machines specially designed to deaden or reducethe sounds ot operation.l Y

' `When the attachment is applied to a writingl machine-ot the kind in which the carriageor the platen is shifted upwardly `for typing upper case characters,rthe movement of the casing with the carriage will cause it to separate from the parts which normally cached for erasure oi correction Vclose its underside at opposite sidesoi' the machine and thereby produce spaces through which thev soundv ot tlie lreys striking the platen may escape. In order to permanentlyV maintain a sound-proof contact between the casing and the pai-.ts abo-ve referred to, I have provided strips 60 at the lower edges of the side platesl and the back plate l? of the casing, which by sliding connection with the casing through the medium of screws or pins 61, remain in place uponthe bott-ein closures of the casing when the latter moves upwardly with the carriage.

.A similar result may be attained by lengthening the slots 32 in the side plates of the casing as shown in Figure lof the drawings, in which case, the carriage moves upwardly separate from the casing which remains in contact with the parts by which its underside is closed.

Having thus described my improved silencer in the most simple and practical form at present known to me, desire it. underl stood that variations in the construction and arrangement of the parts thereof may be resorted to withoutdeparting from the spirit of my invention. i

l/Vhat I claim and'desire to secure by ters Patent is Y and the carriage of a writing machine, anl

element removably fastened on the rame forward ot thecarriage, and an enclosing element removably supported on the carriage, in sound-proof engagement with the rst mentioned element. Y

Leonesa coiriprisinig in combination with thel frame and the Vcarriage of ak writing machine, 'an` element lined 4on the traine, and a partially-I transparent enclosing elen'ient onthe' ear-- riage, -in .'souiidrproot" Vengagement with ythe iirst mentioned element.

f e. A slencin'g attachment for typewritersI f comprising in ycombination]with the frame and the Y rizage' et writing'nfiacliindan upright' 1 te fixed fon the traine'fforwardot the carriage, andan enclosing elIe-r'nenty on thecarriage, in Vsliding contact with the plate.

lencing vattachmei'it for type-writers, comprising in combination with' the:y trame and the carriage ot a writingfm-achine,

upright, partially transparentplate fixed on l* the irame forward' of the carriage, and

enclosing element on thel carriage, in sliding Contact with the plate.

6. A silencing attachment for typewriters comprising in lcombii-iation with the Vframel and the carriage ot a writing machine, an

element `having slide-tace and includ-ing a body portion lined on the frame and fold ing extensions at opposite ends of the body; poi-tion, and an enclosing element on the carriage, in slidng contact withl said' slidetace.

e. it; silencing attachment Jfor typewriters comprising in combination with the frame' and the carriage of a writing machine, an element having a'slLdea-ce and including a body portion tiired on tlie'frame, movable' extensions at opposite ends ot the body portion, and adjustable meansto secure the endY portions in their extended position, and San enclosing element lon the carriage in sliding contact with said slide-face. f

8. A silencing attachment r'for typewriters comprising in combination with the partially open frame and the carriage of a writing machine, an element `lixed on the frame-:forward of the carriage and including a member'l'iaving a slide-tace, and a forwardly projecting cover member which closes the opening of the frame, andv an enclosingV eleinenton the ca 'riage, in sliding contactwith` 115 said slide-face. l Y

9. Alsilencing attachment for typewriters comprising in combination withk the par' tiall'y open frame and the carriage of a writ-Y loo ing machine, an element hired on tlieframe l i forward ot the carriage jand including av member having a slide-taceanda forwardly projecting cover member which closes openings'at'the top and iront' of the trame', and an enclosingelementen the carriage in sliding contact wfth the plate'-meinbe'izv l0. A silencing attachment iortypewritvers comprising in combination withtlie partially openrframe and the carriage of a writing machine, an elemen-t detachably fastened' on the frame forward of the carriage and incliidinga member having a slide-face, and avforvvardly promoting cover member 'which is detachablvastenedto the other member and which closes the opening ofthe frame7 Y and an enclosing element on the carriage, in

sliding contact with. said 'slide-'face `11. A silencing attachment for typewriters comprising in 4combination with the frame and thecarriage off a Writing machine, an elementfixed on the frame7 and Y an element mounted on the carriage, the elements being co-operatively engaged to eng close the sound yproducing parts of the ma'- chine; i i

v12. `A silencing' attachment Jfor typewritf` ers comprising jin v'combination With the vtraine-V and the carriage of .aV Writing'maers' comprising in combination With the frame and the carriage of :a Writing ma# chine, 'an elementvxed on Vthe frame, and a casing on Vthe carriage in ,sliding engage7 mentuvvith said element and having openings for the-protrusion of levers on the carriage and yieldable closures for the Vopen- 15. A silencing attachment for typewriters @comprising in combination with the frame and thecarriageyof a writing mak chine.l an elementixed onthe` frame, and a casing on'the carriage in sliding engagement with said element and having a slot` to ladmit a work" sheet to the'plateii of the carriage. i v

16. "A silencing attachment Jfor t vfpevvfi 'itv ers comprisingl in combination with the framel andthe carriage of a Writing ma@V chine. anYV element fixed on the frame, and

a casing on the carriage in sliding engagement withY said element and having a slot to admit a Work sheet to the platen of the carriage and a yieldable closure for said slot.

17 A silencing attachment for typewriters comprising in combination With the frame and the carriage of a writing machine, an element fixed on the frame, and a casing on the carriage in sliding contact With said elementand including slotted sidemembers straddling the trunnions ofY a platen Vof the carriage.`

18. A silencing attachment for typewritwvitli the carriage,

ers comprisingwin 'combination "vvith the trame' andthe carriage of a Writing ma#y chine, a casing on the carriage, and means 1 to close the underside ofthe casing during movement oi' the carriage; f `V i9. A. vsilencing yattachment for typevvriters comprising in combination- With the ii'aine and the carriage of a lWriting 'machine, a casing onthe carriage and foldable lever-controlled means to close thenn-V deiside of the casing dui-ing its'movem'ent with the carriage.

20. A silencing attachment for tybevvriters comprisingin combination'r Withl the' iframe and the carriage cfa Writing machine, a casing: on the carriage 'andA oldable levercontrolled means vto close 'thief-underside of the" casing vduring itsmoveme'nt `AWit-litfhev carriage.v

* 2l. Avsilencing `attachment for typevvrits i ers comprising 'in ycombination vvithfthe Y frame and the carriage ofY a VvWriting ma chine` a casing on the'carriage, foldable means to close the underside of thevcasing during its movement With the carriage, and manual' mechanism for the adjustment of said means. y f i "22. A silencing attachment fortypewriters comprising in combination' lWith the frame andthe carriage cfa W'ritingimacchine7 a casing on'r the carriage, vincliiding means to close the frame beneath the can" riagek duringfitsfrmovementfvvith the carriage. jV f' .Y 23. A silencing lattachmentffor typewrite ers comprising vin A combination `fvvith4 thel frame vand the carriage of alvvriting ma?A chine, a casingV on the carriage, including foldable means to closethe trame beneath the carriage during itsmovement vvithftheVV carriage;

silencing' attachment 'fory .typevvrit- I ers comprising in combination vvithr the frame andthe carriage cfa Writing ma# chinc,'apcasing on the'carriage, and an element `ixed onl the frame and including means to close ythe 'underside fof `the 'casingduring its'inovement iviththe carriage.4

Y 25. A silencing attachment 'fortypevvrit ers comprising in combination with "the" frame and the "carriage-cfa Writing machine. a casing on the carriage and members evtendingt outwardly at the ends of -the casing for closing the frame beneath the carriage during movement ofthe casing 26.`A silencing attachment for typewriters comprisingV in combinationV With the frame andthe carriage of a writing machine, a casing on the carriage, and memL bers detachably connected at the ends of the casing, to close theV frame beneath the car# riage during movement of the casing With the carriage.

27. A silencing attachment for typewriters comprising in combination with the frame and the carriage of a Writing machine, a casing on the carriage, and outwardly pro-jectingrfolding members at the ends of the casing., to close the frame beneath the carriage during' movement of the easing with the carriage.

28. A silencing attachment for typewriters .comprising in combination With the frame and the carriage of a Writing machine, a casing on the carriage, means to close the underside of the casing during its movement with the carriage, and members on thc casing associated With said means, to close the frame beneath the carriage.

29. A silencing attachment for typewriters ,comprising in combination with the frame and the Vcarriage of a Writing machine, aV casing on the carriage, means to close4 the underside of the casi-ng during its movement with the carri-age, and members on the .easing to close the frame beneath the carriage, movably supported on said closing means.

.80. A silencing attachment for typewriters comprising in combination with the frame and the carriage of a Writing machine, acasing on the carriage, and an element Xed on the frame and including mem bers at opposite ends .of the same, to close the underside `of the casing during its movement with the carriage.

8l. A silencing attachment for typevvrit ers comprising in combination with the frame and the ycarriage of a Writing machine, a casing Von the carriage, an element fixed on the frame and: including members at opposite ends of the same, to close .the underside of the casing during its movement with the carriage, and' members at opposite ends of the casing, to close the frame ',iinderneath the carriage, `movably support- Y ed by said element.

y32. A silencing attachment for typevvrit ers comprising in .combination With the fra-me and the carriage of a Writing machine, a casing .on the carriage, and an element detacha-bly fixed on the frame and including members .at opposite' ends of :the same, to close the underside of the casing during kits movement with the carriage.

'6 I v Lemme `33. AA silencing deviceA for typewriters comprising in combination withV the frame and the carriage of a Writing machine, ya casing on the carriage, an element iflxedon the ytraine and extending at opposite ends thereof, and Vclosing` means tor the underside of the casing during movement of the carriage, foldablvconnected with sai-delement."

34. A Vsilencing device for typewriters comprising in combination with the frame and the, Acarriage of a Writing machine, af

cas-i 9" on `the carriage, anV element fixed on the frame and .en-tending at opposite ends.

thereof, closing means for the underside of `the casing dui-ing movement of the carriage, foldably connected with ysaid -eleiiient,l andl n i-eii'ibers ior'closing thefr'ame beneatlithe v for .closing spaces between the 'casing and the .closure during upward movementot' .the carriage. Y

36. A silencing attachment for typewriters V.comprising in combination vwith vthe frame-and the upwardlyshiftable carriage ot .a writing machine,of.a casing on thev carriagea closure for the underside of the casing, ii'iounted on the frame, and sliding strips on the casing, to close spaces `between the .casing and the closure during upward movement of the carriage-- 37; In a silencing device for Writing ina cliiniesra. revolubleplaten, a. ,platen carri-age` enclosingy .cover havinga slot positioned relative to the platen to .admit of the insertion ot' .a work sheet to the platen ofthe carriage,

said slot substantially coterminous with the platen, and. said. cover mounted on said carriage to travel therewith, to keep thevslot always in register With the platen. p

In. testimony whereof I .have `affixed `my signature;

noYAL- epANmL. 

